UIAlertView *alertView = [[UIAlertView alloc]                            initWithTitle:@"Alert"                            message:@"You've been delivered an alert"                            delegate:nil                            cancelButtonTitle:@"Cancel"                            otherButtonTitles:@"Ok", nil];[alertView show];

 self.view.backgroundColor = [UIColor whiteColor];

NSString *message = @"Are you sure you want to open this link in Safari?";UIAlertView *alertView = [[UIAlertView alloc]                            initWithTitle:@"Open Link"                            message:message                            delegate:self                            cancelButtonTitle:[self noButtonTitle]                            otherButtonTitles:[self yesButtonTitle], nil];[alertView show];

 more samples

// one button alertUIAlertView *alert =    [[UIAlertView alloc]     initWithTitle: @"Hello"    message: @"Hello Master HaKu!"    delegate: self    cancelButtonTitle: @"OK"    OtherButtonTitles: nil];[alert show];[alert release];                            // two buttons alertUIAlertView *alert =    [[UIAlertView alloc]     initWithTitle: @"Hello"    message: @"Hello Master HaKu!"    delegate: self    cancelButtonTitle: @"YES"    OtherButtonTitles: @"NO", nil];[alert show];[alert release];                            // more buttons alertUIAlertView *alert =    [[UIAlertView alloc]     initWithTitle: @"Hello"    message: @"Hello Master HaKu!"    delegate: self    cancelButtonTitle: @"OK"    OtherButtonTitles: @"Option1", @"Option2", nil];[alert show];[alert release];                            @interface AlertTestViewController : UIViewController
     
      @end// alert click implmentation- (void) alertView: (UIAlertView *)alertViewclickedButtonAtIndex: (NSInteger)buttonIndex{    NSLog(@"%d", buttonIndex);}